Will This Hardware All Work Together

[GuiltySpark]

Hello chaps.

I'm trying to build a new system. I'm in the UK so I can't use Newegg, but I've linked to the parts on there as most of you are in the States and are used to it.

This is what I have so far.

Intel Core 2 Quad Q8200 2.33GHz 4MB L2 Cache LGA 775 95W Quad-Core Processor

HIS Hightech H487F1GP Radeon HD 4870 1GB 256-bit GDDR5 PCI Express 2.0 x16 HDCP Ready CrossFire Supported Video Card

CORSAIR 4GB (2 x 2GB) 240-Pin DDR2 SDRAM DDR2 800 (PC2 6400) Dual Channel Kit Desktop Memory (Would I be best off going for 553Mhz, 667Mhz, 800Mhz or 1066Mhz memory?)

Antec Three Hundred Black Steel ATX Mid Tower Computer Case

Are there any improvements that could be made there? I just need a PSU and a motherboard now. Could somebody suggest those to me?

Cheers.

 

[Mrbumbum]

GIGABYTE GA-EP45-UD3P
PC Power and cooling 750
G.SKILL PI Black 4GB (2 x 2GB) 240-Pin DDR2 SDRAM DDR2 800
Western Digital Caviar Black 640gb